How does Flutter achieve native performance despite using Dart?

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Flutter achieves native performance despite using Dart through several key architectural decisions:

1. Ahead-of-Time (AOT) Compilation: Flutter compiles Dart code to native ARM or x64 machine code using AOT compilation. This eliminates the need for a JavaScript bridge (as used in some other frameworks), reducing overhead and boosting runtime performance to near-native levels.

2. Skia Rendering Engine: Flutter uses its own high-performance rendering engine, Skia, which redraws every frame and pixel on the screen. This gives Flutter full control over UI rendering, ensuring consistent 60fps or even 120fps animations, independent of the platform's native UI components.

3. No Native UI Components: Unlike other frameworks that rely on native platform widgets, Flutter renders its own widgets, meaning it doesn't rely on OEM UI components. This avoids performance issues caused by bridging to native components and gives more consistent behavior across platforms.

4. Efficient Widget System: Flutter’s widget tree uses an efficient rendering and update mechanism. Its "reactive" framework ensures only the parts of the UI that need updating are rebuilt, keeping UI rendering fast.

5. Direct Access to Platform APIs: Dart code can communicate with native code (Java/Kotlin for Android, Objective-C/Swift for iOS) using platform channels. This allows Flutter apps to leverage native APIs and hardware-accelerated features when needed.

Together, these features allow Flutter to deliver high-performance, native-feeling applications across platforms using Dart.

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